# include <iostream>
# include <cstring>

void server();
void client();

int main(int ac, char **av)
{
    if (ac != 2)
    {
        std::cerr << "Usage : a.out client | server" << std::endl;
    }
    else
    {
        if (strcmp(av[1], "server") == 0)
            server();
        else if (strcmp(av[1], "client") == 0)
            client();
        else
        {
            std::cerr << "Usage : a.out client | server" << std::endl;
        }
    }
    return 0;
}
